ZIP Code Tabulation Area · Iowa

ZIP Code 51366: Clay County, IA

ZIP Code 51366 (Clay County, Iowa) has an estimated 245 residents in 104 households. The median household income is $87,500, the median home value is $130,800 and the median gross rent is $681/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Some estimates have a large margin of error. 3 figures for this ZIP (bachelor's or higher, gross rent, commute) are marked with *. ACS figures come from a sample, and small areas have fewer responses, so treat these numbers as rough ranges.

Total population

245

Margin of error ±82

Median household income

$87,500

Margin of error ±$42,441

Median home value

$130,800

Margin of error ±$30,420

Median gross rent

$681/mo*

Margin of error ±$355· estimate has a large margin of error

Median age

50.8 yrs

Margin of error ±14.9 yrs

Mean travel time to work

19.1 min*

Margin of error ±11.9 min· estimate has a large margin of error

How ZIP 51366 compares with Iowa and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 5136650.8 yrsIowa38.6 yrsUnited States38.9 yrs

Median household income

ZIP 51366$87,500Iowa$75,059United States$80,734

Per capita income

ZIP 51366$50,048Iowa$40,877United States$44,673

Poverty rate

ZIP 513662.4%Iowa11.1%United States12.5%

Unemployment rate

ZIP 513660.0%Iowa3.6%United States5.2%

Bachelor's degree or higher

ZIP 5136613.8%*Iowa31.4%United States35.7%

Median home value

ZIP 51366$130,800Iowa$208,000United States$332,700

Median gross rent

ZIP 51366$681/mo*Iowa$972/moUnited States$1,413/mo

Owner-occupied homes

ZIP 5136684.6%Iowa71.7%United States65.2%

Mean travel time to work

ZIP 5136619.1 min*Iowa19.8 minUnited States26.4 min

Worked from home

ZIP 513667.1%Iowa11.3%United States15.1%

All figures for ZIP 51366

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 51366 — ACS 2020–2024 5-year estimates
Measure	ZIP 51366	Margin of error	Iowa	United States
Total population	245	±82	3,210,507	334,922,499
Median age	50.8 yrs	±14.9 yrs	38.6 yrs	38.9 yrs
Households	104	±36	1,315,707	129,227,496
Median household income	$87,500	±$42,441	$75,059	$80,734
Per capita income	$50,048	±$17,434	$40,877	$44,673
Poverty rate	2.4%	±3.2 pts	11.1%	12.5%
Unemployment rate	0.0%	±7.9 pts	3.6%	5.2%
Bachelor's degree or higher	13.8%*	±10.3 pts	31.4%	35.7%
Median home value	$130,800	±$30,420	$208,000	$332,700
Median gross rent	$681/mo*	±$355	$972/mo	$1,413/mo
Owner-occupied homes	84.6%	±5.5 pts	71.7%	65.2%
Mean travel time to work	19.1 min*	±11.9 min	19.8 min	26.4 min
Worked from home	7.1%	±8.2 pts	11.3%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 51366
Group	ZIP 51366	Iowa	United States
White alone, not Hispanic or Latino	99.6%	82.3%	57.4%
Black or African American alone, not Hispanic or Latino	0.0%	3.8%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.0%	0.2%	0.5%
Asian alone, not Hispanic or Latino	0.0%	2.5%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.0%	0.2%	0.2%
Some other race alone, not Hispanic or Latino	0.0%	0.3%	0.6%
Two or more races, not Hispanic or Latino	0.4%	3.5%	4.3%
Hispanic or Latino (of any race)	0.0%	7.3%	19.3%

Where ZIP 51366 is

State: Iowa
Main county: Clay County— also overlaps Buena Vista County
Largest overlapping place: Webb (1% of the ZIP's land area)
Land area: 62.33 sq mi· about 4 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Clay County

51033 Clay County, IA 51047 Clay County, IA 51301 Clay County, IA 51333 Clay County, IA 51338 Clay County, IA 51340 Fostoria, IA 51341 Gillett Grove, IA 51343 Clay County, IA 51357 Clay County, IA

See every ZIP code in Iowa, or compare ZIP 51366 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.